Please help with classes!

[magyar]

Hello,

I am trying to use classes for the first time. I have 3 files: a header file that defines the class, a cpp file that defines the member-functions, and a cpp file that creates and manipulates the class objects (and includes the main function). I have provided the code I am using for these three files, and the data file I am using. I receive a slew of error messages when I try to run this. What could I be doing wrong?

 //Grocery.h
//Header file which contains class (GroceryItem) definition

#include<iostream>
#include<string>
using namespace std;

#ifndef GROCERYITEM_H
#define GROCERYITEM_H

class GroceryItem

{
public:
	GroceryItem();//default constructor
	void set_item_name(string);
	void set_item_price(int);
	void set_qty_on_hand(int);
	void set_qty_purchased(int);
	string get_item_name();
	int get_item_price();
	int get_qty_on_hand();
	int get_qty_purchased();
private:
	string item_name;
	int item_price;
	int qty_on_hand;
	int qty_purchased;
};

#endif



//Grocery1.cpp
//Member-functions for the GroceryItem class

#include<iostream>
#include "Grocery.h"
using namespace std;

GroceryItem::GroceryItem()
{
	item_name = " ";
	item_price = 0;
	qty_on_hand = 0;
	qty_purchased = 0;
}

void GroceryItem::set_item_name(string name)
{
	item_name = name;
}

void GroceryItem::set_item_price(int price)
{
	if( price > 0)
		item_price = price;

	if( price <= 0)
	{ 
		item_price = 0;
		cout << "Price cannot be negative. Price has been set to zero" << endl;
	}
}

void GroceryItem::set_qty_on_hand(int onhand)
{
	if( onhand > 0)
	
		qty_on_hand = onhand;

	if( onhand <=0 )
	{ 
		onhand = 0;
		cout << "Quantity on hand cannot be negative. Quantity on hand has been set to zero" << endl;
	}
}

void GroceryItem::set_qty_purchased(int purchased)
{
	if( purchased > 0)
	
		qty_purchased = purchased;

	if( purchased <= 0 )
	{ 
		purchased = 0;
		cout << "Quantity purchased cannot be negative. Quantity purchased has been set to zero" << endl;
	}
	
}

string GroceryItem::get_item_name()
{
	return item_name;
}


int GroceryItem::get_item_price()
{
	return item_price;
}

int GroceryItem::get_qty_on_hand()
{
	return qty_on_hand;
}

int GroceryItem::get_qty_purchased()
{
	return qty_purchased;
}


//Grocery2.cpp
//Create and manipulate GroceryItem class objects

#include<iostream>
#include "Grocery.h"
using namespace std;

#include<fstream>

const int NUM_ITEMS = 10;
const int SIZE_A = 30;

int main()
{
	GroceryItem grocery_items[NUM_ITEMS];
	
	ifstream inFile;
	inFile.open("Grocery.txt");
	
	int k;
	for(k = 0; k < NUM_ITEMS; k++)
	{
		
		inFile.getline(grocery_items[k].get_item_name, SIZE_A);
		inFile >> grocery_items[k].get_item_price() >> grocery_items[k].get_qty_on_hand() >> grocery_items[k].get_qty_purchased();
	}

	
	cout<<"The grocery items along with their respective price, qty on hand, and qty purchased are: "<<endl;

	for(k = 0; k < NUM_ITEMS; k++)
	{
		cout<<grocery_items[k].get_item_name()<<" "<<grocery_items[k].get_item_price()
			<<" "<<grocery_items[k].get_qty_on_hand()<<" "<<grocery_items[k].get_qty_purchased();
	}
	

	char answer;
	const int SIZE = 30;
	char item[SIZE];
	int qnty;

	for(k = 0; k < NUM_ITEMS; k++)
	{
		cout<<"Please indicate the grocery items you want: "<<endl;
		cin.getline(item, SIZE);
		cout<<"Please the quantity of the items wanted: "<<endl;
		cin>>qnty;
		grocery_items[k].set_item_name;
		grocery_items[k].set_qty_purchased;
		cin.ignore(256,'\n');	
	}
	
	int Total = 0;

	for(k = 0; k < NUM_ITEMS; k++)
	{
		cout<<"The customer purchased: "<<grocery_items[k].get_qty_purchased<<" "<<grocery_items[k].get_item_name;

		Total = Total + grocery_items[k].get_item_price * grocery_items[k].get_qty_purchased;
	}


	cout<<"The customer's total bill is: "<<Total<<endl;
	cout<<"The order will be delivered by the end of the day."<<endl;
	
}

//Grocery.txt
//Data file

Raisan Bran
3.49
300
Milk
1.49
200
WhiteBread
2.49
50
Butter
2.49
100
Grape Jelly
1.09
50
Peanut Butter
2.49
45
Tomato Soup
.49
200
Cherry Yogurt
.69
250
Vanilla Yogurt
.69
200
Rye Bread
1.49
55

[wildblue]

What is the actual name of your header file, groceryitem.h or grocery.h?

#ifndef GROCERYITEM_H
#define GROCERYITEM_H 

#include "Grocery.h"

[AbstractionAnon]

Line 139: get_item_name is a function name (pointer). Since item_name is private, you're going to need to to read the item name into a temporary string, then call set_item_name with the temporary string.

Line 140: You're trying to input into getter functions. You can't do that.

Line 164,165: These are setters. You're not calling them as functions.

Line 173,175: These are getters, but you're not calling them as functions.